[llvm-commits] CVS: reopt/lib/TraceCache/VirtualMem.cpp

[Brian Gaeke]

Changes in directory reopt/lib/TraceCache:

VirtualMem.cpp updated: 1.16 -> 1.17

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Log message:

Document VirtualMem::writeBranchInstruction().


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Diffs of the changes:  (+7 -3)

Index: reopt/lib/TraceCache/VirtualMem.cpp
diff -u reopt/lib/TraceCache/VirtualMem.cpp:1.16 reopt/lib/TraceCache/VirtualMem.cpp:1.17
--- reopt/lib/TraceCache/VirtualMem.cpp:1.16	Fri Apr 23 16:25:10 2004
+++ reopt/lib/TraceCache/VirtualMem.cpp	Mon Apr 26 14:49:59 2004
@@ -108,10 +108,14 @@
   }
 }
 
-//write branch inst, followed by a null inst in delay slot
-//
+/// writeBranchInstruction - Create a BA,A (Branch Always with Prediction
+/// with Annul bit set) instruction from LOCATION to TARGET, and write it to
+/// the address LOCATION.  (The annul bit is set so that the branch's delay
+/// slot instruction will be annulled.)
+///
 void VirtualMem::writeBranchInstruction(uint64_t location, uint64_t target){
-  //create branch will annul bit set
+  // The first argument to getDepJumpInstr sets the annul bit and the "always"
+  // condition.
   unsigned int instToWrite = getDepJumpInstr(0x30800000, target, location);
   writeInstToVM(location, instToWrite);
 }